贵阳市大气中气态汞形态分布特征的初步研究
Preliminary study of the distribution of gaseous mercury species in the air of Guiyang City, China
查看参考文献14篇
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文摘
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2002年3月份我们对贵阳市大气的气态汞形态进行了采样分析。大气气态总汞用Tekran537A大气自动测汞仪采集测定。活性气态汞用镀KCl扩散管采集，热还原法分解并以冷原子荧光法(CVAFS)分析。结果显示，采样期间贵阳市气态总汞平均浓度为7．09ng/m^3，活性气态汞平均含量38．3pg/m^3。气态总汞浓度远高于全球背景浓度值；活性气态汞浓度稍高于欧洲和美国的边远地区。活性气态汞浓度与大气相对湿度呈负相关关系，相关系数为—0．39(α＜0．01)。由于大气相对湿度较高，活性气态汞只占气态总汞的0．5％。原子态汞和活性气态汞的基本来源是燃煤释放。 |
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其他语种文摘
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TGM and RGM concentrations in ambient air at one site of Guiyang City were determined in March 2002. TGM concentrations were monitored using an automated mercury vapor analyzer Tekran-2537A, and RGM in ambient air was sampled using KC1 coated tubular denuders. The sampled RGM denuders were analyzed using thermal desorption coupled with CVAFS detection. The average concentrations of TGM and RGM are 7.09 rig. m~-3 and 38.3pg.m~-3, respectively, during the sampling period. The primary anthropogenic source for both Hg° and RGM is coal combustion in the study area. TGM concentrations are significantly elevated comparing to the global background values, whereas RGM concentrations are only slightly higher than the reported values in remote areas in Europe and US. RGM only constitutes 0.5% of TGM in the air at the sampling period. There is a significant negative correlation between RGM concentration and relative humidity (RH) , with a coefficient correlation of - 0.39 (a < 0.01) . High relative humidity during the sampling is responsible for the relatively low RGM concentrations observed. |
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来源
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矿物岩石地球化学通报
,2003,22(2):156-158 【扩展库】
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关键词
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贵阳市
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大气污染
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气态汞
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形态分布
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热还原法
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冷原子荧光法分析
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地址
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中国科学院地球化学研究所, 环境地球化学国家重点实验室, 贵阳, 550002
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1007-2802 |
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学科
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环境污染及其防治 |
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基金
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中国科学院“百人计划”项目
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国家自然科学基金
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文献收藏号
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CSCD:1330968
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